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Parity, charge conjugation, and SU(3) constraints on threshold enhancement in J/psi decays into gamma p(p)over-bar and Kp(Lambda)over-bar
He, XG; Li, XQ; Ma, JP; He, XG , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
2005
发表期刊PHYSICAL REVIEW D
ISSN0556-2821
卷号71期号:1页码:-
摘要We study the threshold enhancement effects of baryon-antibaryon systems in J/psi decays at BES using parity P, charge conjugation C, and flavor SU(3) symmetries. The P and C symmetries restrict the p (p) over bar in J/psi-->gammap (p) over bar to be in a state with C=+1, while the p (p) over bar in J/psi-->pi(0)p (p) over bar to be with C=-1. Combining the C and P symmetries with flavor SU(3) symmetry, i.e., the CPS symmetry, we find that the Lambda(p) over bar system cannot be in 0(+) and 0(-) states in J/psi-->K(+)Lambda(p) over bar. We provide a consistent explanation of observation and nonobservation of near threshold enhancements in J/psi-->K(+)Lambda(p) over bar and J/psi-->pi(0)p (p) over bar, respectively. We also find that near baryon pair threshold enhancement can happen in several channels for J/psi decays and can be several times larger than that observed in J/psi-->K(+)Lambda(p) over bar in some channels.
部门归属Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Peking Univ, Dept Phys, Beijing, Peoples R China
学科领域Physics
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收录类别SCI
WOS记录号WOS:000226702300050
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被引频次:13[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13921
专题理论物理所SCI论文
通讯作者He, XG , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
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He, XG,Li, XQ,Ma, JP,et al. Parity, charge conjugation, and SU(3) constraints on threshold enhancement in J/psi decays into gamma p(p)over-bar and Kp(Lambda)over-bar[J]. PHYSICAL REVIEW D,2005,71(1):-.
APA He, XG,Li, XQ,Ma, JP,&He, XG , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China..(2005).Parity, charge conjugation, and SU(3) constraints on threshold enhancement in J/psi decays into gamma p(p)over-bar and Kp(Lambda)over-bar.PHYSICAL REVIEW D,71(1),-.
MLA He, XG,et al."Parity, charge conjugation, and SU(3) constraints on threshold enhancement in J/psi decays into gamma p(p)over-bar and Kp(Lambda)over-bar".PHYSICAL REVIEW D 71.1(2005):-.
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